3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array(1, 2, 1, 3); array_unique($arr); var_dump($arr);
based on CjEK7
Output for 4.3.0 - 7.2.0
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(1) [3]=> int(3) }